His friends were ___________and encouraged him to publish his ideas, but Copernicus was cautious.

—What do you think of the good news?—Wonderful! It makes us _____．Most of us were _____about it 

When we finally arrived, a lady gave us a _______ introduction of the university.

When a customer withdraws money from the bank, it is required to leave his signature. But how can we be sure it is_______?

 Reading without stop is a ______ piece of work.